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alladhīna yadhkurūna llāha qiyāman wa-quʿūdan wa-ʿalā junūbihim wa-yatafakkarūna fī khalqi s-samāwāti wa-l-ʾarḍi rabbanā mā khalaqta hādhā bāṭilan subḥānaka fa-qinā ʿadhāba n-nāri
Those who remember Allah standing, sitting, and lying on their sides, and reflect on the creation of the heavens and the earth [and say], ‘Our Lord, You have not created this in vain! Immaculate are You! Save us from the punishment of the Fire.
— Ali Quli Qarai
Surah 'Ali-Imran, Verse 191
191. "Those who remember Allah while standing, sitting and lying on their sides, and mediate on the creation of the heavens and the earth, (seriously saying) 'Our Lord! You have not created (all) this in vain! Glory be to you! Save us then from the torment of the Fire'."
The remembrance of Allah in all conditions of a person is the sign of wisdom.
And, 'the possessors of intellects' are those who remember Allah and contemplate. The Qur'an introduces them such:
Faith is worthy when it is based on intelligence and contemplation. It says:
We should know this fact that the farther we keep aloof from the god aims, the nearer we will approach to Hell and we must return that distance again. The world of creation has not been done in vain even though we do not realize all its secrets.